Frequently Asked Questions
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The John Guest Speedfit 12mm Male to 3/8" BSPP Male Adaptor is designed to connect a 15mm push-fit fitting to a 3/8" BSPP (British Standard Pipe Parallel) female threaded connection. It is ideal for fresh water plumbing systems in caravans, motorhomes, campervans, boats and horseboxes where a 3/8" BSPP threaded appliance or fitting is being installed.
Installation is quick and straightforward. Simply push the 12mm male stem into a compatible 12mm push-fit fitting, then screw the 3/8" BSPP male thread into the matching female threaded connection. The push-fit connection provides a secure, leak-resistant seal without the need for tools, solvent or sealants.
Manufactured from durable, corrosion-resistant acetal, this genuine John Guest fitting is suitable for hot and cold fresh water systems. The push-fit connection is fully demountable, allowing the fitting to be removed easily for servicing or future maintenance.
This adaptor allows you to connect a 12mm push-fit fitting to a 3/8" BSPP female threaded connection, making it ideal for pumps, filters, taps and other fresh water components.
Yes. The 12mm male stem is designed to fit compatible 12mm John Guest Speedfit push-fit fittings and other compatible 12mm push-fit systems.
BSPP (British Standard Pipe Parallel) is a parallel thread commonly used on fresh water plumbing components. The adaptor is designed to screw into a matching 3/8" BSPP female thread.
Can't find the answer you're looking for?
Give our technical team a call on 01271 611015 (Option 2) and we'll be happy to help.